/*

This file is part of Ext JS 4

Copyright (c) 2011 Sencha Inc

Contact:  http://www.sencha.com/contact

Commercial Usage
Licensees holding valid commercial licenses may use this file in accordance with the Commercial Software License Agreement provided with the Software or, alternatively, in accordance with the terms contained in a written agreement between you and Sencha.

If you are unsure which license is appropriate for your use, please contact the sales department at http://www.sencha.com/contact.

*/
/**
 * @class Ext.grid.LockingView
 * This class is used internally to provide a single interface when using
 * a locking grid. Internally, the locking grid creates 2 separate grids,
 * so this class is used to map calls appropriately.
 * @ignore
 */
Ext.define('Ext.grid.LockingView', {
    
    mixins: {
        observable: 'Ext.util.Observable'
    },
    
    eventRelayRe: /^(beforeitem|beforecontainer|item|container|cell)/,
    
    constructor: function(config){
        var me = this,
            eventNames = [],
            eventRe = me.eventRelayRe,
            locked = config.locked.getView(),
            normal = config.normal.getView(),
            events,
            event;
        
        Ext.apply(me, {
            lockedView: locked,
            normalView: normal,
            lockedGrid: config.locked,
            normalGrid: config.normal,
            panel: config.panel
        });
        me.mixins.observable.constructor.call(me, config);
        
        // relay events
        events = locked.events;
        for (event in events) {
            if (events.hasOwnProperty(event) && eventRe.test(event)) {
                eventNames.push(event);
            }
        }
        me.relayEvents(locked, eventNames);
        me.relayEvents(normal, eventNames);
        
        normal.on({
            scope: me,
            itemmouseleave: me.onItemMouseLeave,
            itemmouseenter: me.onItemMouseEnter
        });
        
        locked.on({
            scope: me,
            itemmouseleave: me.onItemMouseLeave,
            itemmouseenter: me.onItemMouseEnter
        });
    },
    
    getGridColumns: function() {
        var cols = this.lockedGrid.headerCt.getGridColumns();
        return cols.concat(this.normalGrid.headerCt.getGridColumns());
    },
    
    getEl: function(column){
        return this.getViewForColumn(column).getEl();
    },
    
    getViewForColumn: function(column) {
        var view = this.lockedView,
            inLocked;
        
        view.headerCt.cascade(function(col){
            if (col === column) {
                inLocked = true;
                return false;
            }
        });
        
        return inLocked ? view : this.normalView;
    },
    
    onItemMouseEnter: function(view, record){
        var me = this,
            locked = me.lockedView,
            other = me.normalView,
            item;
            
        if (view.trackOver) {
            if (view !== locked) {
                other = locked;
            }
            item = other.getNode(record);
            other.highlightItem(item);
        }
    },
    
    onItemMouseLeave: function(view, record){
        var me = this,
            locked = me.lockedView,
            other = me.normalView;
            
        if (view.trackOver) {
            if (view !== locked) {
                other = locked;
            }
            other.clearHighlight();
        }
    },
    
    relayFn: function(name, args){
        args = args || [];
        
        var view = this.lockedView;
        view[name].apply(view, args || []);    
        view = this.normalView;
        view[name].apply(view, args || []);   
    },
    
    getSelectionModel: function(){
        return this.panel.getSelectionModel();    
    },
    
    getStore: function(){
        return this.panel.store;
    },
    
    getNode: function(nodeInfo){
        // default to the normal view
        return this.normalView.getNode(nodeInfo);
    },
    
    getCell: function(record, column){
        var view = this.getViewForColumn(column),
            row;
            
        row = view.getNode(record);
        return Ext.fly(row).down(column.getCellSelector());
    },
    
    getRecord: function(node){
        var result = this.lockedView.getRecord(node);
        if (!node) {
            result = this.normalView.getRecord(node);
        }
        return result;
    },
    
    addElListener: function(eventName, fn, scope){
        this.relayFn('addElListener', arguments);
    },
    
    refreshNode: function(){
        this.relayFn('refreshNode', arguments);
    },
    
    refresh: function(){
        this.relayFn('refresh', arguments);
    },
    
    bindStore: function(){
        this.relayFn('bindStore', arguments);
    },
    
    addRowCls: function(){
        this.relayFn('addRowCls', arguments);
    },
    
    removeRowCls: function(){
        this.relayFn('removeRowCls', arguments);
    }
       
});
